| TROUBLESHOOTING |
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| Observe all Safety Guidelines detailed throughout this manual |
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| PROBLEMS |
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| POSSIBLE |
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| RECOMMENDED |
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| (SYMPTOMS) |
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| CAUSE |
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| COURSE OF ACTION |
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| PROBLEMS |
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Intermittent wire feed when trigger is | 1. | Drive roll has become galled. |
| 1. | Remove and then clean or replace |
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pulled. |
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| drive roll. (See Maintenance Section) |
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| 2. | Wire has become kinked along its feed | 2. | Manually pull wire slowly thru gun until |
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| path. |
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| unkinked wire emerges. |
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Poor fume extraction. | 1. | Fume powder deposits are blocking off | 1. | Remove the powdered deposits. |
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| gun passages at the fume collection |
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| nozzle or fume tube. |
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| 2. | Excessive air currents. |
| 2. | Block off air drafts. |
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| 3. | Gun has excessive air leaks. |
| 3. | Check for loose hose clamps or |
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| 4. | Trigger and accessory switch leads | 4. | detached hoses. |
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| Reroute | leads (See Maintenance |
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| are blocking fume air flow. |
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| Section). |
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| 5. | Fume | extraction | equipment | is | 5. | Switch on or plug in extraction equip- |
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| switched off. |
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| ment. |
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| 6. | Fume extraction equipment is non- | 6. | See Troubleshooting section in extrac- |
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| functional. |
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| torʼs instruction manual. |
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| 7. | Fume | extraction | equipment | has | 7. | Clean or replace filters per equipment |
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| blocked filters. |
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| instructions. |
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| 8. | Lincoln Miniflex extractor is set to low | 8. | Set to high speed. |
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| speed. |
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| 9. | Vacuum hose is partially or completely | 9. | Attempt to straighten out hose or |
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| flattened or blocked. |
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| remove | blockage; | otherwise replace |
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| hose. |
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| 10. Vacuum hose is punctured or torn. | 10. Punctures: Patch | hose with tape |
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| Tears: Replace hose. |
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Frequent occurrence of contact tip burn- | 1. | Improper welding parameters or tech- | 1. | See welding wire literature for proper |
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back. |
| nique (example: ESO is too short). |
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| settings |
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| 2. | Wire may be feeding intermittently. |
| 2. | See symptoms on intermittent or slug- |
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| gish wire feed |
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CAUTION
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.